Interferences in electron emission from O2 by 30 MeV O5;8+ impact

WINKWORTH, M.; PABLO D. FAINSTEIN; GALASSI, M. E.; BARAN, J.; DASSANAYAKE, B. S.; DAS, S.; KAYANI, A.; TANIS, J.

NUCLEAR INSTRUMENTS AND METHODS IN PHYSICS RESEARCH B - BEAM INTERACTIONS WITH MATERIALS AND ATOMS

ELSEVIER SCIENCE BV

Lugar: Amsterdam; Año: 2009 vol. 267 p. 373 - 376

0168-583X

Interference structures in the ejected electron spectra for 30 MeV O5,8+ + O2 are investigated. The measured electron yields were studied for electron energies from 5 to 400 eV and observation angles of 30°, 60°, 90°, 120° and 150° with respect to the incident beam direction. Experimental molecular cross-sections were normalized to theoretical molecular one-center cross-sections revealing oscillatory structures suggestive of secondary interferences as evidenced by the independence on the observation angle. An oscillation interval for 30 MeV O5,8+ + O2 of Δk  4 a.u. is found, a value two times larger than that previously observed for 3 MeV H+ + N2. No obvious evidence for primary Young-type interferences was seen.